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<pre><span class="sourceLineNo">001</span>/*<a name="line.1"></a>
<span class="sourceLineNo">002</span> * Licensed to the Apache Software Foundation (ASF) under one or more<a name="line.2"></a>
<span class="sourceLineNo">003</span> * contributor license agreements.  See the NOTICE file distributed with<a name="line.3"></a>
<span class="sourceLineNo">004</span> * this work for additional information regarding copyright ownership.<a name="line.4"></a>
<span class="sourceLineNo">005</span> * The ASF licenses this file to You under the Apache License, Version 2.0<a name="line.5"></a>
<span class="sourceLineNo">006</span> * (the "License"); you may not use this file except in compliance with<a name="line.6"></a>
<span class="sourceLineNo">007</span> * the License.  You may obtain a copy of the License at<a name="line.7"></a>
<span class="sourceLineNo">008</span> *<a name="line.8"></a>
<span class="sourceLineNo">009</span> *      http://www.apache.org/licenses/LICENSE-2.0<a name="line.9"></a>
<span class="sourceLineNo">010</span> *<a name="line.10"></a>
<span class="sourceLineNo">011</span> * Unless required by applicable law or agreed to in writing, software<a name="line.11"></a>
<span class="sourceLineNo">012</span> * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.12"></a>
<span class="sourceLineNo">013</span> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.13"></a>
<span class="sourceLineNo">014</span> * See the License for the specific language governing permissions and<a name="line.14"></a>
<span class="sourceLineNo">015</span> * limitations under the License.<a name="line.15"></a>
<span class="sourceLineNo">016</span> */<a name="line.16"></a>
<span class="sourceLineNo">017</span><a name="line.17"></a>
<span class="sourceLineNo">018</span>package org.apache.commons.logging.impl;<a name="line.18"></a>
<span class="sourceLineNo">019</span><a name="line.19"></a>
<span class="sourceLineNo">020</span>import org.apache.avalon.framework.logger.Logger;<a name="line.20"></a>
<span class="sourceLineNo">021</span>import org.apache.commons.logging.Log;<a name="line.21"></a>
<span class="sourceLineNo">022</span><a name="line.22"></a>
<span class="sourceLineNo">023</span>/**<a name="line.23"></a>
<span class="sourceLineNo">024</span> * Implementation of commons-logging Log interface that delegates all<a name="line.24"></a>
<span class="sourceLineNo">025</span> * logging calls to the Avalon logging abstraction: the Logger interface.<a name="line.25"></a>
<span class="sourceLineNo">026</span> * &lt;p&gt;<a name="line.26"></a>
<span class="sourceLineNo">027</span> * There are two ways in which this class can be used:<a name="line.27"></a>
<span class="sourceLineNo">028</span> * &lt;ul&gt;<a name="line.28"></a>
<span class="sourceLineNo">029</span> * &lt;li&gt;the instance can be constructed with an Avalon logger<a name="line.29"></a>
<span class="sourceLineNo">030</span> * (by calling {@link #AvalonLogger(Logger)}). In this case, it acts<a name="line.30"></a>
<span class="sourceLineNo">031</span> * as a simple thin wrapping implementation over the logger. This is<a name="line.31"></a>
<span class="sourceLineNo">032</span> * particularly useful when using a property setter.<a name="line.32"></a>
<span class="sourceLineNo">033</span> * &lt;/li&gt;<a name="line.33"></a>
<span class="sourceLineNo">034</span> * &lt;li&gt;the {@link #setDefaultLogger} class property can be called which<a name="line.34"></a>
<span class="sourceLineNo">035</span> * sets the ancestral Avalon logger for this class. Any &lt;code&gt;AvalonLogger&lt;/code&gt;<a name="line.35"></a>
<span class="sourceLineNo">036</span> * instances created through the &lt;code&gt;LogFactory&lt;/code&gt; mechanisms will output<a name="line.36"></a>
<span class="sourceLineNo">037</span> * to child loggers of this &lt;code&gt;Logger&lt;/code&gt;.<a name="line.37"></a>
<span class="sourceLineNo">038</span> * &lt;/li&gt;<a name="line.38"></a>
<span class="sourceLineNo">039</span> * &lt;/ul&gt;<a name="line.39"></a>
<span class="sourceLineNo">040</span> * &lt;p&gt;<a name="line.40"></a>
<span class="sourceLineNo">041</span> * &lt;strong&gt;Note:&lt;/strong&gt; &lt;code&gt;AvalonLogger&lt;/code&gt; does not implement Serializable<a name="line.41"></a>
<span class="sourceLineNo">042</span> * because the constructors available for it make this impossible to achieve in all<a name="line.42"></a>
<span class="sourceLineNo">043</span> * circumstances; there is no way to "reconnect" to an underlying Logger object on<a name="line.43"></a>
<span class="sourceLineNo">044</span> * deserialization if one was just passed in to the constructor of the original<a name="line.44"></a>
<span class="sourceLineNo">045</span> * object. This class &lt;i&gt;was&lt;/i&gt; marked Serializable in the 1.0.4 release of<a name="line.45"></a>
<span class="sourceLineNo">046</span> * commons-logging, but this never actually worked (a NullPointerException would<a name="line.46"></a>
<span class="sourceLineNo">047</span> * be thrown as soon as the deserialized object was used), so removing this marker<a name="line.47"></a>
<span class="sourceLineNo">048</span> * is not considered to be an incompatible change.<a name="line.48"></a>
<span class="sourceLineNo">049</span> *<a name="line.49"></a>
<span class="sourceLineNo">050</span> * @version $Id: AvalonLogger.java 1435115 2013-01-18 12:40:19Z tn $<a name="line.50"></a>
<span class="sourceLineNo">051</span> */<a name="line.51"></a>
<span class="sourceLineNo">052</span>public class AvalonLogger implements Log {<a name="line.52"></a>
<span class="sourceLineNo">053</span><a name="line.53"></a>
<span class="sourceLineNo">054</span>    /** Ancestral Avalon logger. */<a name="line.54"></a>
<span class="sourceLineNo">055</span>    private static volatile Logger defaultLogger = null;<a name="line.55"></a>
<span class="sourceLineNo">056</span>    /** Avalon logger used to perform log. */<a name="line.56"></a>
<span class="sourceLineNo">057</span>    private final transient Logger logger;<a name="line.57"></a>
<span class="sourceLineNo">058</span><a name="line.58"></a>
<span class="sourceLineNo">059</span>    /**<a name="line.59"></a>
<span class="sourceLineNo">060</span>     * Constructs an &lt;code&gt;AvalonLogger&lt;/code&gt; that outputs to the given<a name="line.60"></a>
<span class="sourceLineNo">061</span>     * &lt;code&gt;Logger&lt;/code&gt; instance.<a name="line.61"></a>
<span class="sourceLineNo">062</span>     *<a name="line.62"></a>
<span class="sourceLineNo">063</span>     * @param logger the Avalon logger implementation to delegate to<a name="line.63"></a>
<span class="sourceLineNo">064</span>     */<a name="line.64"></a>
<span class="sourceLineNo">065</span>    public AvalonLogger(Logger logger) {<a name="line.65"></a>
<span class="sourceLineNo">066</span>        this.logger = logger;<a name="line.66"></a>
<span class="sourceLineNo">067</span>    }<a name="line.67"></a>
<span class="sourceLineNo">068</span><a name="line.68"></a>
<span class="sourceLineNo">069</span>    /**<a name="line.69"></a>
<span class="sourceLineNo">070</span>     * Constructs an &lt;code&gt;AvalonLogger&lt;/code&gt; that will log to a child<a name="line.70"></a>
<span class="sourceLineNo">071</span>     * of the &lt;code&gt;Logger&lt;/code&gt; set by calling {@link #setDefaultLogger}.<a name="line.71"></a>
<span class="sourceLineNo">072</span>     *<a name="line.72"></a>
<span class="sourceLineNo">073</span>     * @param name the name of the avalon logger implementation to delegate to<a name="line.73"></a>
<span class="sourceLineNo">074</span>     */<a name="line.74"></a>
<span class="sourceLineNo">075</span>    public AvalonLogger(String name) {<a name="line.75"></a>
<span class="sourceLineNo">076</span>        if (defaultLogger == null) {<a name="line.76"></a>
<span class="sourceLineNo">077</span>            throw new NullPointerException("default logger has to be specified if this constructor is used!");<a name="line.77"></a>
<span class="sourceLineNo">078</span>        }<a name="line.78"></a>
<span class="sourceLineNo">079</span>        this.logger = defaultLogger.getChildLogger(name);<a name="line.79"></a>
<span class="sourceLineNo">080</span>    }<a name="line.80"></a>
<span class="sourceLineNo">081</span><a name="line.81"></a>
<span class="sourceLineNo">082</span>    /**<a name="line.82"></a>
<span class="sourceLineNo">083</span>     * Gets the Avalon logger implementation used to perform logging.<a name="line.83"></a>
<span class="sourceLineNo">084</span>     *<a name="line.84"></a>
<span class="sourceLineNo">085</span>     * @return avalon logger implementation<a name="line.85"></a>
<span class="sourceLineNo">086</span>     */<a name="line.86"></a>
<span class="sourceLineNo">087</span>    public Logger getLogger() {<a name="line.87"></a>
<span class="sourceLineNo">088</span>        return logger;<a name="line.88"></a>
<span class="sourceLineNo">089</span>    }<a name="line.89"></a>
<span class="sourceLineNo">090</span><a name="line.90"></a>
<span class="sourceLineNo">091</span>    /**<a name="line.91"></a>
<span class="sourceLineNo">092</span>     * Sets the ancestral Avalon logger from which the delegating loggers will descend.<a name="line.92"></a>
<span class="sourceLineNo">093</span>     *<a name="line.93"></a>
<span class="sourceLineNo">094</span>     * @param logger the default avalon logger,<a name="line.94"></a>
<span class="sourceLineNo">095</span>     * in case there is no logger instance supplied in constructor<a name="line.95"></a>
<span class="sourceLineNo">096</span>     */<a name="line.96"></a>
<span class="sourceLineNo">097</span>    public static void setDefaultLogger(Logger logger) {<a name="line.97"></a>
<span class="sourceLineNo">098</span>        defaultLogger = logger;<a name="line.98"></a>
<span class="sourceLineNo">099</span>    }<a name="line.99"></a>
<span class="sourceLineNo">100</span><a name="line.100"></a>
<span class="sourceLineNo">101</span>    /**<a name="line.101"></a>
<span class="sourceLineNo">102</span>    * Logs a message with &lt;code&gt;org.apache.avalon.framework.logger.Logger.debug&lt;/code&gt;.<a name="line.102"></a>
<span class="sourceLineNo">103</span>    *<a name="line.103"></a>
<span class="sourceLineNo">104</span>    * @param message to log<a name="line.104"></a>
<span class="sourceLineNo">105</span>    * @param t log this cause<a name="line.105"></a>
<span class="sourceLineNo">106</span>    * @see org.apache.commons.logging.Log#debug(Object, Throwable)<a name="line.106"></a>
<span class="sourceLineNo">107</span>     */<a name="line.107"></a>
<span class="sourceLineNo">108</span>    public void debug(Object message, Throwable t) {<a name="line.108"></a>
<span class="sourceLineNo">109</span>        if (getLogger().isDebugEnabled()) {<a name="line.109"></a>
<span class="sourceLineNo">110</span>            getLogger().debug(String.valueOf(message), t);<a name="line.110"></a>
<span class="sourceLineNo">111</span>        }<a name="line.111"></a>
<span class="sourceLineNo">112</span>    }<a name="line.112"></a>
<span class="sourceLineNo">113</span><a name="line.113"></a>
<span class="sourceLineNo">114</span>    /**<a name="line.114"></a>
<span class="sourceLineNo">115</span>     * Logs a message with &lt;code&gt;org.apache.avalon.framework.logger.Logger.debug&lt;/code&gt;.<a name="line.115"></a>
<span class="sourceLineNo">116</span>     *<a name="line.116"></a>
<span class="sourceLineNo">117</span>     * @param message to log.<a name="line.117"></a>
<span class="sourceLineNo">118</span>     * @see org.apache.commons.logging.Log#debug(Object)<a name="line.118"></a>
<span class="sourceLineNo">119</span>     */<a name="line.119"></a>
<span class="sourceLineNo">120</span>    public void debug(Object message) {<a name="line.120"></a>
<span class="sourceLineNo">121</span>        if (getLogger().isDebugEnabled()) {<a name="line.121"></a>
<span class="sourceLineNo">122</span>            getLogger().debug(String.valueOf(message));<a name="line.122"></a>
<span class="sourceLineNo">123</span>        }<a name="line.123"></a>
<span class="sourceLineNo">124</span>    }<a name="line.124"></a>
<span class="sourceLineNo">125</span><a name="line.125"></a>
<span class="sourceLineNo">126</span>    /**<a name="line.126"></a>
<span class="sourceLineNo">127</span>     * Logs a message with &lt;code&gt;org.apache.avalon.framework.logger.Logger.error&lt;/code&gt;.<a name="line.127"></a>
<span class="sourceLineNo">128</span>     *<a name="line.128"></a>
<span class="sourceLineNo">129</span>     * @param message to log<a name="line.129"></a>
<span class="sourceLineNo">130</span>     * @param t log this cause<a name="line.130"></a>
<span class="sourceLineNo">131</span>     * @see org.apache.commons.logging.Log#error(Object, Throwable)<a name="line.131"></a>
<span class="sourceLineNo">132</span>     */<a name="line.132"></a>
<span class="sourceLineNo">133</span>    public void error(Object message, Throwable t) {<a name="line.133"></a>
<span class="sourceLineNo">134</span>        if (getLogger().isErrorEnabled()) {<a name="line.134"></a>
<span class="sourceLineNo">135</span>            getLogger().error(String.valueOf(message), t);<a name="line.135"></a>
<span class="sourceLineNo">136</span>        }<a name="line.136"></a>
<span class="sourceLineNo">137</span>    }<a name="line.137"></a>
<span class="sourceLineNo">138</span><a name="line.138"></a>
<span class="sourceLineNo">139</span>    /**<a name="line.139"></a>
<span class="sourceLineNo">140</span>     * Logs a message with &lt;code&gt;org.apache.avalon.framework.logger.Logger.error&lt;/code&gt;.<a name="line.140"></a>
<span class="sourceLineNo">141</span>     *<a name="line.141"></a>
<span class="sourceLineNo">142</span>     * @param message to log<a name="line.142"></a>
<span class="sourceLineNo">143</span>     * @see org.apache.commons.logging.Log#error(Object)<a name="line.143"></a>
<span class="sourceLineNo">144</span>     */<a name="line.144"></a>
<span class="sourceLineNo">145</span>    public void error(Object message) {<a name="line.145"></a>
<span class="sourceLineNo">146</span>        if (getLogger().isErrorEnabled()) {<a name="line.146"></a>
<span class="sourceLineNo">147</span>            getLogger().error(String.valueOf(message));<a name="line.147"></a>
<span class="sourceLineNo">148</span>        }<a name="line.148"></a>
<span class="sourceLineNo">149</span>    }<a name="line.149"></a>
<span class="sourceLineNo">150</span><a name="line.150"></a>
<span class="sourceLineNo">151</span>    /**<a name="line.151"></a>
<span class="sourceLineNo">152</span>     * Logs a message with &lt;code&gt;org.apache.avalon.framework.logger.Logger.fatalError&lt;/code&gt;.<a name="line.152"></a>
<span class="sourceLineNo">153</span>     *<a name="line.153"></a>
<span class="sourceLineNo">154</span>     * @param message to log.<a name="line.154"></a>
<span class="sourceLineNo">155</span>     * @param t log this cause.<a name="line.155"></a>
<span class="sourceLineNo">156</span>     * @see org.apache.commons.logging.Log#fatal(Object, Throwable)<a name="line.156"></a>
<span class="sourceLineNo">157</span>     */<a name="line.157"></a>
<span class="sourceLineNo">158</span>    public void fatal(Object message, Throwable t) {<a name="line.158"></a>
<span class="sourceLineNo">159</span>        if (getLogger().isFatalErrorEnabled()) {<a name="line.159"></a>
<span class="sourceLineNo">160</span>            getLogger().fatalError(String.valueOf(message), t);<a name="line.160"></a>
<span class="sourceLineNo">161</span>        }<a name="line.161"></a>
<span class="sourceLineNo">162</span>    }<a name="line.162"></a>
<span class="sourceLineNo">163</span><a name="line.163"></a>
<span class="sourceLineNo">164</span>    /**<a name="line.164"></a>
<span class="sourceLineNo">165</span>     * Logs a message with &lt;code&gt;org.apache.avalon.framework.logger.Logger.fatalError&lt;/code&gt;.<a name="line.165"></a>
<span class="sourceLineNo">166</span>     *<a name="line.166"></a>
<span class="sourceLineNo">167</span>     * @param message to log<a name="line.167"></a>
<span class="sourceLineNo">168</span>     * @see org.apache.commons.logging.Log#fatal(Object)<a name="line.168"></a>
<span class="sourceLineNo">169</span>     */<a name="line.169"></a>
<span class="sourceLineNo">170</span>    public void fatal(Object message) {<a name="line.170"></a>
<span class="sourceLineNo">171</span>        if (getLogger().isFatalErrorEnabled()) {<a name="line.171"></a>
<span class="sourceLineNo">172</span>            getLogger().fatalError(String.valueOf(message));<a name="line.172"></a>
<span class="sourceLineNo">173</span>        }<a name="line.173"></a>
<span class="sourceLineNo">174</span>    }<a name="line.174"></a>
<span class="sourceLineNo">175</span><a name="line.175"></a>
<span class="sourceLineNo">176</span>    /**<a name="line.176"></a>
<span class="sourceLineNo">177</span>     * Logs a message with &lt;code&gt;org.apache.avalon.framework.logger.Logger.info&lt;/code&gt;.<a name="line.177"></a>
<span class="sourceLineNo">178</span>     *<a name="line.178"></a>
<span class="sourceLineNo">179</span>     * @param message to log<a name="line.179"></a>
<span class="sourceLineNo">180</span>     * @param t log this cause<a name="line.180"></a>
<span class="sourceLineNo">181</span>     * @see org.apache.commons.logging.Log#info(Object, Throwable)<a name="line.181"></a>
<span class="sourceLineNo">182</span>     */<a name="line.182"></a>
<span class="sourceLineNo">183</span>    public void info(Object message, Throwable t) {<a name="line.183"></a>
<span class="sourceLineNo">184</span>        if (getLogger().isInfoEnabled()) {<a name="line.184"></a>
<span class="sourceLineNo">185</span>            getLogger().info(String.valueOf(message), t);<a name="line.185"></a>
<span class="sourceLineNo">186</span>        }<a name="line.186"></a>
<span class="sourceLineNo">187</span>    }<a name="line.187"></a>
<span class="sourceLineNo">188</span><a name="line.188"></a>
<span class="sourceLineNo">189</span>    /**<a name="line.189"></a>
<span class="sourceLineNo">190</span>     * Logs a message with &lt;code&gt;org.apache.avalon.framework.logger.Logger.info&lt;/code&gt;.<a name="line.190"></a>
<span class="sourceLineNo">191</span>     *<a name="line.191"></a>
<span class="sourceLineNo">192</span>     * @param message to log<a name="line.192"></a>
<span class="sourceLineNo">193</span>     * @see org.apache.commons.logging.Log#info(Object)<a name="line.193"></a>
<span class="sourceLineNo">194</span>     */<a name="line.194"></a>
<span class="sourceLineNo">195</span>    public void info(Object message) {<a name="line.195"></a>
<span class="sourceLineNo">196</span>        if (getLogger().isInfoEnabled()) {<a name="line.196"></a>
<span class="sourceLineNo">197</span>            getLogger().info(String.valueOf(message));<a name="line.197"></a>
<span class="sourceLineNo">198</span>        }<a name="line.198"></a>
<span class="sourceLineNo">199</span>    }<a name="line.199"></a>
<span class="sourceLineNo">200</span><a name="line.200"></a>
<span class="sourceLineNo">201</span>    /**<a name="line.201"></a>
<span class="sourceLineNo">202</span>     * Is logging to &lt;code&gt;org.apache.avalon.framework.logger.Logger.debug&lt;/code&gt; enabled?<a name="line.202"></a>
<span class="sourceLineNo">203</span>     * @see org.apache.commons.logging.Log#isDebugEnabled()<a name="line.203"></a>
<span class="sourceLineNo">204</span>     */<a name="line.204"></a>
<span class="sourceLineNo">205</span>    public boolean isDebugEnabled() {<a name="line.205"></a>
<span class="sourceLineNo">206</span>        return getLogger().isDebugEnabled();<a name="line.206"></a>
<span class="sourceLineNo">207</span>    }<a name="line.207"></a>
<span class="sourceLineNo">208</span><a name="line.208"></a>
<span class="sourceLineNo">209</span>    /**<a name="line.209"></a>
<span class="sourceLineNo">210</span>     * Is logging to &lt;code&gt;org.apache.avalon.framework.logger.Logger.error&lt;/code&gt; enabled?<a name="line.210"></a>
<span class="sourceLineNo">211</span>     * @see org.apache.commons.logging.Log#isErrorEnabled()<a name="line.211"></a>
<span class="sourceLineNo">212</span>     */<a name="line.212"></a>
<span class="sourceLineNo">213</span>    public boolean isErrorEnabled() {<a name="line.213"></a>
<span class="sourceLineNo">214</span>        return getLogger().isErrorEnabled();<a name="line.214"></a>
<span class="sourceLineNo">215</span>    }<a name="line.215"></a>
<span class="sourceLineNo">216</span><a name="line.216"></a>
<span class="sourceLineNo">217</span>    /**<a name="line.217"></a>
<span class="sourceLineNo">218</span>     * Is logging to &lt;code&gt;org.apache.avalon.framework.logger.Logger.fatalError&lt;/code&gt; enabled?<a name="line.218"></a>
<span class="sourceLineNo">219</span>     * @see org.apache.commons.logging.Log#isFatalEnabled()<a name="line.219"></a>
<span class="sourceLineNo">220</span>     */<a name="line.220"></a>
<span class="sourceLineNo">221</span>    public boolean isFatalEnabled() {<a name="line.221"></a>
<span class="sourceLineNo">222</span>        return getLogger().isFatalErrorEnabled();<a name="line.222"></a>
<span class="sourceLineNo">223</span>    }<a name="line.223"></a>
<span class="sourceLineNo">224</span><a name="line.224"></a>
<span class="sourceLineNo">225</span>    /**<a name="line.225"></a>
<span class="sourceLineNo">226</span>     * Is logging to &lt;code&gt;org.apache.avalon.framework.logger.Logger.info&lt;/code&gt; enabled?<a name="line.226"></a>
<span class="sourceLineNo">227</span>     * @see org.apache.commons.logging.Log#isInfoEnabled()<a name="line.227"></a>
<span class="sourceLineNo">228</span>     */<a name="line.228"></a>
<span class="sourceLineNo">229</span>    public boolean isInfoEnabled() {<a name="line.229"></a>
<span class="sourceLineNo">230</span>        return getLogger().isInfoEnabled();<a name="line.230"></a>
<span class="sourceLineNo">231</span>    }<a name="line.231"></a>
<span class="sourceLineNo">232</span><a name="line.232"></a>
<span class="sourceLineNo">233</span>    /**<a name="line.233"></a>
<span class="sourceLineNo">234</span>     * Is logging to &lt;code&gt;org.apache.avalon.framework.logger.Logger.debug&lt;/code&gt; enabled?<a name="line.234"></a>
<span class="sourceLineNo">235</span>     * @see org.apache.commons.logging.Log#isTraceEnabled()<a name="line.235"></a>
<span class="sourceLineNo">236</span>     */<a name="line.236"></a>
<span class="sourceLineNo">237</span>    public boolean isTraceEnabled() {<a name="line.237"></a>
<span class="sourceLineNo">238</span>        return getLogger().isDebugEnabled();<a name="line.238"></a>
<span class="sourceLineNo">239</span>    }<a name="line.239"></a>
<span class="sourceLineNo">240</span><a name="line.240"></a>
<span class="sourceLineNo">241</span>    /**<a name="line.241"></a>
<span class="sourceLineNo">242</span>     * Is logging to &lt;code&gt;org.apache.avalon.framework.logger.Logger.warn&lt;/code&gt; enabled?<a name="line.242"></a>
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